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Finding the Fourth Proportional to 77,889.65, 116,834.42 and 18,725.30

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Solution

The fourth proportional to 77,889.65, 116,834.42 and 18,725.30 is: 28,087.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,889.65 : 116,834.42 = 18,725.30 : x
  2. Step 2: Convert to fraction form
    77,889.65/116,834.42 = 18,725.30/x
  3. Step 3: Cross multiply
    77,889.65x = 116,834.42 × 18,725.30
  4. Step 4: Simplify right side
    77,889.65x = 2,187,759,564.83
  5. Step 5: Solve for x
    x = 2,187,759,564.83/77,889.65
  6. Step 6: Final answer
    x = 28,087.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.